The Canada_Line opened with 2 car trains and is still running just 2 car trains. https://www.youtube.com/watch?v=a1ouk0VifwM&t=817s
https://thecanadaline.com/station-history No reasonable attempt was made to make sure that the stations could eventually accommodate at least 5 car trains.
https://en.wikipedia.org/wiki/Canada_Line#Stations The inadequate 50 m stations can only accommodate a 2.5 car train, not a 5 car train.
https://globalnews.ca/news/5778392/canada-line-10-year-anniversary/
https://buzzer.translink.ca/2024/08/skytrains-canada-line-marks-15th-anniversary/
https://en.wikipedia.org/wiki/Canada_Line#Technology
https://www.atkinsrealis.com/en/projects/the-canada-line
https://thetyee.ca/News/2025/01/31/Canada-Line-New-Stop-Years-Making/
https://www.bb-gi.com/investment/canada-line/
Airport to Downtown Vancouver Transit Guide (Don't Take a Taxi!) https://www.youtube.com/watch?v=9bNYrJhUgu0
This $9 Train Saves You $40 at Vancouver Airport (YVR to Canada Place) https://www.youtube.com/watch?v=ZxUpww86dow
Fortunately, the REM trains in Montreal can accommodate 4 car trains, as does the Skyline_(Honolulu).
The big mistake for all 3 of the Skytrain lines was not having all of the stations to be capable of accommodating 6-8 car trains. Plus, allowing for a future level station clearance of 153 m-160 m. That would have allowed Greater Vancouver to start of with short REM & Skyline type trains, with the capability to eventually have trains as long as those on the Montreal_Metro.
Proper big city transportation infrastructure is so difficult to plan and build in backwards BC.